lackluster

/L AE1 K L AH0 S T ER0/
noun
  1. 1

    Lack of brightness or points of interest.

  2. 2

    A person or thing of no particular brilliance or intelligence.

adjective
  1. 1

    Lacking brilliance or intelligence.

  2. 2

    Having no shine or lustre; dull.

  3. 3

    Not exceptional; not worthy of special merit, attention, or interest; having no vitality.

    โ€œThe actor gave a lackluster performance in his latest film.โ€

Source: https://en.wiktionary.org/wiki/lackluster